London 9 - Lovelace - Bahare-Bahreinian - JS-Core-1 - Week 1

exercises/B-hello-world/exercise.js

@@ -1 +1,5 @@
 console.log("Hello world");
+console.log("i study in code your future");
+console.log("hello" ,4 ," hello");
+console.log('bbc');
+console.log(544);

exercises/C-variables/exercise.js

@@ -1,3 +1,6 @@
 // Start by creating a variable `greeting`
-
+let greeting="Hello world";
+console.log(greeting);
 console.log(greeting);
+console.log(greeting);
+

exercises/D-strings/exercise.js

@@ -1,3 +1,4 @@
 // Start by creating a variable `message`
-
+let message="this is a string"
 console.log(message);
+console.log(typeof message);

exercises/E-strings-concatenation/exercise.js

@@ -1,3 +1,5 @@
 // Start by creating a variable `message`
-
+let greeting= "Hello ,my name is ";
+let myName ="Bahare";
+let message =greeting+myName;
 console.log(message);

exercises/F-strings-methods/exercise.js

@@ -1,3 +1,4 @@
 // Start by creating a variable `message`
-
+let myName="Bahare"
+let message="My name is "+myName+" and my name is "+myName.length +" characters long"
 console.log(message);

exercises/F-strings-methods/exercise2.js

@@ -1,3 +1,3 @@
 const name = " Daniel  ";
-
+let message="My name is "+name+" and my name is "+(name.trim()).length +" characters long"
 console.log(message);

exercises/G-numbers/exercise.js

@@ -1 +1,6 @@
 // Start by creating a variables `numberOfStudents` and `numberOfMentors`
+let numberOfStudents= 15;
+let numberOfMentors= 8;
+console.log("Number of students: " +numberOfStudents);
+console.log("Number of mentors: "+numberOfMentors);
+console.log("Total number of students and mentors: " +(numberOfStudents+numberOfMentors))

exercises/I-floats/exercise.js

@@ -1,2 +1,4 @@
 var numberOfStudents = 15;
 var numberOfMentors = 8;
+console.log("Percentage students: "+ Math.round((numberOfStudents*100)/(numberOfMentors+numberOfStudents))+"%");
+console.log("Percentage mentors: "+ Math.round((numberOfMentors*100)/(numberOfMentors+numberOfStudents))+"%");

exercises/J-functions/exercise.js

@@ -1,5 +1,6 @@
 function halve(number) {
   // complete the function here
+  return number/2;
 }
 
 var result = halve(12);

exercises/J-functions/exercise2.js

@@ -1,5 +1,6 @@
 function triple(number) {
   // complete function here
+  return number*3;
 }
 
 var result = triple(12);

exercises/K-functions-parameters/exercise.js

@@ -1,6 +1,7 @@
 // Complete the function so that it takes input parameters
-function multiply() {
+function multiply(a ,b) {
   // Calculate the result of the function and return it
+  return a*b;
 }
 
 // Assign the result of calling the function the variable `result`

exercises/K-functions-parameters/exercise2.js

@@ -1,4 +1,7 @@
 // Declare your function first
+function divide (a,b){
+    return a/b;
+}
 
 var result = divide(3, 4);
 

exercises/K-functions-parameters/exercise3.js

@@ -1,4 +1,7 @@
 // Write your function here
+function createGreeting (name){
+    return "Hello, my name is "+name ;
+}
 
 var greeting = createGreeting("Daniel");
 

exercises/K-functions-parameters/exercise4.js

@@ -1,5 +1,8 @@
 // Declare your function first
+function add (a,b){
+    return a+b;
+}
 
 // Call the function and assign to a variable `sum`
 
-console.log(sum);
+console.log(sum=add(13,124));

exercises/K-functions-parameters/exercise5.js

@@ -1,5 +1,8 @@
 // Declare your function here
 
+function createLongGreeting (a,b){
+    return "Hello, my name is "+a+" and I'm "+b+" years old";
+}
 const greeting = createLongGreeting("Daniel", 30);
 
 console.log(greeting);

exercises/L-functions-nested/exercise.js

@@ -3,3 +3,25 @@ var mentor2 = "Irina";
 var mentor3 = "Mimi";
 var mentor4 = "Rob";
 var mentor5 = "Yohannes";
+function convertToUpperCase (name){
+    return name.toUpperCase()
+}
+function shoutyGreeting (mentor){
+    let upperCase=convertToUpperCase(mentor);
+    let greeting="Hello "+upperCase
+     return greeting;
+ }
+
+
+console.log(shoutyGreeting(mentor1));
+console.log(shoutyGreeting(mentor2));
+console.log(shoutyGreeting(mentor3));
+console.log(shoutyGreeting(mentor4));
+console.log(shoutyGreeting(mentor5));
+
+
+
+
+
+
+

extra/1-currency-conversion.js

@@ -5,7 +5,9 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(price) {
+  return price*1.4;
+}
 
 /*
   CURRENCY CONVERSION
@@ -15,7 +17,9 @@ function convertToUSD() {}
   They have also decided that they should add a 1% fee to all foreign transactions, which means you only convert 99% of the £ to BRL.
 */
 
-function convertToBRL() {}
+function convertToBRL(price) {
+  return Number(((price*0.99)*5.7).toFixed(2));
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

extra/2-piping.js

@@ -16,26 +16,29 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(num1,num2) {
+  return num1+num2;
 }
 
-function multiply() {
-
+function multiply(num1,num2) {
+  return num1*num2;
 }
 
-function format() {
+function format(num) {
+  return "£"+num;
 
 }
 
 const startingValue = 2;
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode =
+let badCode =format(multiply(add(startingValue, 10), 2));
+
 
 /* BETTER PRACTICE */
+//Just for fun,i dont know the better way to write that code:)
 
-let goodCode =
+let goodCode =format((startingValue+10)*2);
 
 /* ======= TESTS - DO NOT MODIFY ===== 
 There are some Tests in this file that will help you work out if your code is working.

extra/3-magic-8-ball.js

@@ -1,7 +1,7 @@
 /**
 
   Let's peer into the future using a Magic 8 Ball!
-  https://en.wikipedia.org/wiki/Magic_8-Ball 
+  https://en.wikipedia.org/wiki/Magic_8-Ball
 
   There are a few steps to being able view the future though:
   * Ask a question
@@ -14,7 +14,7 @@
 
   Below are the possible answers:
 
-  ## Very positive
+  ## Very positive
     It is certain.
     It is decidedly so.
     Without a doubt.
@@ -45,11 +45,46 @@
 
 // This should log "The ball has shaken!"
 // and return the answer.
+let answer = "";
 function shakeBall() {
   //Write your code in here
+
+  const answers = [
+    [
+      "It is certain.",
+      "It is decidedly so.",
+      "Without a doubt.",
+      "Yes - definitely.",
+      "You may rely on it.",
+    ],
+    [
+      "As I see it, yes.",
+      "Most likely.",
+      "Outlook good.",
+      "Yes.",
+      "Signs point to yes.",
+    ],
+    [
+      "Reply hazy, try again.",
+      "Ask again later.",
+      "Better not tell you now.",
+      "Cannot predict now.",
+      "Concentrate and ask again.",
+    ],
+    [
+      "Don't count on it.",
+      "My reply is no.",
+      "My sources say no.",
+      "Outlook not so good.",
+      "Very doubtful.",
+    ],
+  ];
+  console.log("The ball has shaken!");
+  return (answer =
+    answers[Math.floor(Math.random() * 4)][Math.floor(Math.random() * 5)]);
 }
 
-/* 
+/*
   This function should say whether the answer it is given is
     - very positive
     - positive
@@ -60,9 +95,55 @@ function shakeBall() {
 */
 function checkAnswer(answer) {
   //Write your code in here
+  const answers = [
+    [
+      "It is certain.",
+      "It is decidedly so.",
+      "Without a doubt.",
+      "Yes - definitely.",
+      "You may rely on it.",
+    ],
+    [
+      "As I see it, yes.",
+      "Most likely.",
+      "Outlook good.",
+      "Yes.",
+      "Signs point to yes.",
+    ],
+    [
+      "Reply hazy, try again.",
+      "Ask again later.",
+      "Better not tell you now.",
+      "Cannot predict now.",
+      "Concentrate and ask again.",
+    ],
+    [
+      "Don't count on it.",
+      "My reply is no.",
+      "My sources say no.",
+      "Outlook not so good.",
+      "Very doubtful.",
+    ],
+  ];
+
+  for (let i = 0; i < 4; i++) {
+    for (let j = 0; j < 5; j++) {
+      if (answers[i][j] === answer) {
+        if (i === 0) {
+          return "very positive";
+        } else if (i === 1) {
+          return "positive";
+        } else if (i === 2) {
+          return "negative";
+        } else {
+          return "very negative";
+        }
+      }
+    }
+  }
 }
 
-/* 
+/*
 ==================================
 ======= TESTS - DO NOT MODIFY =====
 
@@ -82,12 +163,11 @@ test("whole magic 8 ball sequence", () => {
   expect(consoleLogSpy).toHaveBeenCalledTimes(1);
   expect(consoleLogSpy).toHaveBeenLastCalledWith("The ball has shaken!");
 
-  expect(checkAnswer(answer)).toBeOneOf([
-    "very positive",
-    "positive",
-    "negative",
-    "very negative",
-  ]);
+  expect(
+    ["very positive", "positive", "negative", "very negative"].includes(
+      checkAnswer(answer)
+    )
+  ).toEqual(true);
 });
 
 test("magic 8 ball returns different values each time", () => {
@@ -101,7 +181,9 @@ test("magic 8 ball returns different values each time", () => {
     );
   }
 
-  let seenPositivities = new Set(Array.from(seenAnswers.values()).map(checkAnswer));
+  let seenPositivities = new Set(
+    Array.from(seenAnswers.values()).map(checkAnswer)
+  );
   if (seenPositivities.size < 2) {
     throw Error(
       "Expected to random answers with different positivities each time shakeBall was called, but always got the same one"
@@ -115,4 +197,4 @@ test("checkAnswer works for `It is decidedly so.`", () => {
 
 test("checkAnswer works for `My reply is no.`", () => {
   expect(checkAnswer("My reply is no.")).toEqual("very negative");
-});
+});

mandatory/1-syntax-errors.js

@@ -1,16 +1,17 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a, b, c) {
   return a + b + c;
 }
 
-function introduceMe(name, age)
-  return "Hello, my name is " + name "and I am " age + "years old";
+function introduceMe(name, age){
+  return "Hello, my name is "+ name +" and I am "+age +" years old";
+}
 
 function getTotal(a, b) {
-  total = a ++ b;
+   let total = a + b;
 
-  return "The total is total";
+  return "The total is " +total;
 }
 
 /* 
@@ -19,7 +20,8 @@ function getTotal(a, b) {
 
 There are some Tests in this file that will help you work out if your code is working.
 
-To run the tests for just this one file, type `npm test -- --testPathPattern 1-syntax-errors` into your terminal
+To run the tests for just this one file, type `
+` into your terminal
 (Reminder: You must have run `npm install` one time before this will work!)
 
 ===================================================